Aquarium Sponge: Made of eco-friendly sponge which is harmless to all your fish. Tube: made of non-toxic, durable plastic. The aquarium sponge filter can clean debris, stabilize water quality, can cultivate useful bacteria beneficial to aquatic animals. Biochemical cotton filter is the main source of air pump, the use of air compression system to provide power, can filter the fish tank of harmful floaters, harmful substances adsorbed on the ‘sponge, the water back to the tank. Hazardous substances are decomposed by the sponge nitrifying bacteria and transformed into harmless substances for fish and returned to the aquarium, suitable for all kinds of fish to keep and monitor. Note: can not use tap water or hot water, the section to use to clean the aquarium water. Note: 1. Due to the different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures. Thank you very much 2. Please allow 1-3cm error due to manual measurement.
